<template>
  <div class="cart">
    <h4>全部商品</h4>
    <div class="cart-main">
      <div class="cart-th">
        <div class="cart-th1">全部</div>
        <div class="cart-th2">商品</div>
        <div class="cart-th3">单价（元）</div>
        <div class="cart-th4">数量</div>
        <div class="cart-th5">小计（元）</div>
        <div class="cart-th6">操作</div>
      </div>
      <div class="cart-body">
        <ul class="cart-list" v-for="(shop,index) in  cartInfoList" :key="shop.id">
          <li class="cart-list-con1">
            <input type="checkbox" name="chk_list" v-model="shop.isChecked" @change="updateChecked(shop,$event)">
          </li>
          <li class="cart-list-con2">
            <img :src="shop.imgUrl">
            <div class="item-msg">{{shop.skuName}}</div>
          </li>
          <li class="cart-list-con4">
            <span class="price">{{shop.skuPrice}}.00</span>
          </li>
          <li class="cart-list-con5">
            <a href="javascript:void(0)" class="mins" @click="updateChange(shop,-1,'miune')">-</a>
            <input autocomplete="off" type="text" :value="shop.skuNum" minnum="1" class="itxt" @blur="updateChange(shop,$event.target.value*1,'input')">
            <a href="javascript:void(0)" class="plus" @click="updateChange(shop,1,'add')">+</a>
          </li>
          <li class="cart-list-con6">
            <span class="sum">{{shop.skuNum*shop.skuPrice}}</span>
          </li>
          <li class="cart-list-con7">
            <a  class="sindelet" @click="deleteShop(shop)">删除</a>
            <br>
            <a href="#none">移到收藏</a>
          </li>
        </ul>
      </div>
    </div>
    <div class="cart-tool">
      <div class="select-all">
        <input class="chooseAll" type="checkbox" v-model="isChecks" @change="AllChecked">
        <span>全选</span>
      </div>
      <div class="option">
        <a @click="deleteCheck">删除选中的商品</a>
        <a href="#none">移到我的关注</a>
        <a href="#none">清除下柜商品</a>
      </div>
      <div class="money-box">
        <div class="chosed">已选择
          <span>{{cartInfoList.length}}</span>件商品</div>
        <div class="sumprice">
          <em>总价（不含运费） ：</em>
          <i class="summoney">{{totalPrice}}</i>
        </div>
        <div class="sumbtn">
          <router-link class="sum-btn" to='/trade' target="_blank">结算</router-link>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import {mapGetters} from 'vuex'
  export default {
    name: 'ShopCart',
    mounted(){
        this.getShopCartList()
    },
    methods:{
      getShopCartList(){
          this.$store.dispatch('getShopCartList')
      },
     async updateChange(shop,disNum,flay){
        switch(flay){
          case 'add':
            disNum = 1;
            break;
          case 'miune':
            // 记住判断的是携带的数据
            if(shop.skuNum<1){
              disNum = 0
            }else{
              disNum = -1
            }
            break;
          case 'input':
            if(isNaN(disNum)||disNum<1){
              disNum = 0
            }else{
              disNum = parseInt(disNum) - shop.skuNum
            }
            break;
        }
        try{
          await this.$store.dispatch('addShopCart',{skuId:shop.skuId,skuNum:disNum})
          this.getShopCartList();
        }catch(error){
          alert('修改数据失败')
        }
      },
      // 删除商品 需要知道成功没成功
     async deleteShop(shop){
          try{
             await this.$store.dispatch('deleteShop',shop.skuId);
              this.getShopCartList()
          }catch(error){
              alert('删除失败')
          }
      },
      // 单选框选中操作  
      async updateChecked(shop,event){
        let isChecked = event.target.checked?'1':'0'
        try{
            await this.$store.dispatch('updateChecked',{skuId:shop.skuId,isChecked})
            this.getShopCartList()
        }catch(error){
          alert('修改单选框状态失败')
        }
      },
      // 全选框操作  因为只有单选框的api所以需要请求删除商品的api 
      async AllChecked(event){
          let isChecked = event.target.checked ?'1':'0';
          try{
            await this.$store.dispatch('AllChecked',isChecked);
            this.getShopCartList()
          }catch(error){
            alert('全选框设置失败')
          }
      },
      // 删除选中商品
      async deleteCheck(){
          try{
            await this.$store.dispatch('deleteCheck')
            // 请求购物车列表
            this.getShopCartList()
          }catch(error){
              alert('删除选中的商品失败');
          }
      }
    },
    computed:{
      ...mapGetters(['shopCartData']),
      cartInfoList(){
        // 需要兜底undefined不会遍历所以需要兜底不然遍历出来的每一个属性值就会报错
        return this.shopCartData.cartInfoList||[]
    },
    totalPrice(){
      let sum = 0;
      this.cartInfoList.forEach((item)=>{
        sum += item.skuNum*item.skuPrice
      })
      return sum
    },
    isChecks:{
        get(){
          // 使用数组方法every 返回的是boolean值
          return this.cartInfoList.every(item => item.isChecked == 1) && this.cartInfoList.length >0
        },
        set(){
          return ;
        }
    }
  }
}
</script>

<style lang="less" scoped>
  .cart {
    width: 1200px;
    margin: 0 auto;

    h4 {
      margin: 9px 0;
      font-size: 14px;
      line-height: 21px;
    }

    .cart-main {
      .cart-th {
        background: #f5f5f5;
        border: 1px solid #ddd;
        padding: 10px;
        overflow: hidden;

        &>div {
          float: left;
        }

        .cart-th1 {
          width: 25%;

          input {
            vertical-align: middle;
          }

          span {
            vertical-align: middle;
          }
        }

        .cart-th2 {
          width: 25%;
        }

        .cart-th3,
        .cart-th4,
        .cart-th5,
        .cart-th6 {
          width: 12.5%;

        }
      }

      .cart-body {
        margin: 15px 0;
        border: 1px solid #ddd;

        .cart-list {
          padding: 10px;
          border-bottom: 1px solid #ddd;
          overflow: hidden;

          &>li {
            float: left;
          }

          .cart-list-con1 {
            width: 15%;
          }

          .cart-list-con2 {
            width: 35%;

            img {
              width: 82px;
              height: 82px;
              float: left;
            }

            .item-msg {
              float: left;
              width: 150px;
              margin: 0 10px;
              line-height: 18px;
            }
          }

          .cart-list-con4 {
            width: 10%;

          }

          .cart-list-con5 {
            width: 17%;

            .mins {
              border: 1px solid #ddd;
              border-right: 0;
              float: left;
              color: #666;
              width: 6px;
              text-align: center;
              padding: 8px;
            }

            input {
              border: 1px solid #ddd;
              width: 40px;
              height: 33px;
              float: left;
              text-align: center;
              font-size: 14px;
            }

            .plus {
              border: 1px solid #ddd;
              border-left: 0;
              float: left;
              color: #666;
              width: 6px;
              text-align: center;
              padding: 8px;
            }
          }

          .cart-list-con6 {
            width: 10%;

            .sum {
              font-size: 16px;
            }
          }

          .cart-list-con7 {
            width: 13%;

            a {
              color: #666;
            }
          }
        }
      }
    }

    .cart-tool {
      overflow: hidden;
      border: 1px solid #ddd;

      .select-all {
        padding: 10px;
        overflow: hidden;
        float: left;

        span {
          vertical-align: middle;
        }

        input {
          vertical-align: middle;
        }
      }

      .option {
        padding: 10px;
        overflow: hidden;
        float: left;

        a {
          float: left;
          padding: 0 10px;
          color: #666;
        }
      }

      .money-box {
        float: right;

        .chosed {
          line-height: 26px;
          float: left;
          padding: 0 10px;
        }

        .sumprice {
          width: 200px;
          line-height: 22px;
          float: left;
          padding: 0 10px;

          .summoney {
            color: #c81623;
            font-size: 16px;
          }
        }

        .sumbtn {
          float: right;

          a {
            display: block;
            position: relative;
            width: 96px;
            height: 52px;
            line-height: 52px;
            color: #fff;
            text-align: center;
            font-size: 18px;
            font-family: "Microsoft YaHei";
            background: #e1251b;
            overflow: hidden;
          }
        }
      }
    }
  }
</style>